Low door bridge assembly NVH testing machine

Abstract

The present invention relates to the field of vehicle NVH testing technology, and specifically to a low gate bridge assembly NVH testing machine. The problem that the connection method of the existing device is cumbersome and not cheap when connected to the ground gate bridge assembly is addressed. It includes a T-type bottom plate, on which a symmetrically distributed output shaft rack is installed, the output shaft rack is provided with an output connecting shaft, the output connecting shaft is fixed with a fixing ring, and evenly distributed sliding blocks are provided in the fixing ring, the sliding block is rotatably connected to a connecting rod, the connecting rod is rotatably connected to a sliding rod, and the output connecting shaft is slidably connected to a spring telescopic rod on the side close to the gate bridge assembly. The present invention drives the adjacent components to move through the spring telescopic rod, and adjusts the distance that the sliding rod extends out of the adjacent output connecting shaft, so that the device can automatically adapt to the output shafts of gate bridge assemblies with different diameters, thereby increasing the convenience of the device.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle NVH testing, and in particular to a low door bridge assembly NVH testing machine. Background Art

[0002] NVH test is an experiment used to detect the amount of noise and vibration generated by vehicle parts when the vehicle is running. This test can be used to detect assembled vehicle parts, and can also detect vehicle assemblies that have been assembled in various parts. When using existing test equipment to detect the low-gate bridge assembly of a vehicle, it is necessary to connect the motor shaft of the existing test equipment to the input shaft of the low-gate bridge assembly, and adjust the speed of the input shaft of the low-gate bridge assembly to simulate the operation of the vehicle engine. Then, the load shaft of the existing test equipment is connected to the output shaft of the low-gate bridge assembly, and the load of the output shaft of the low-gate bridge assembly is adjusted to simulate various road conditions encountered during the operation of the vehicle. The existing test equipment has simulated During the process, the vibration and noise generated by the low gate bridge assembly during the operation of the vehicle are detected through microphones and vibration sensors designed in various places. The existing low gate bridge assembly is usually designed with various diameters and styles, and the positions and numbers of bolts fixed thereon for connecting with the vehicle are also different. The load shaft of the existing device is usually directly connected to the output shaft adjacent to the low gate bridge assembly through bolts and nuts. The connection process is cumbersome, time-consuming and labor-intensive, and when the position of the bolts on the low gate bridge assembly changes, the load shaft needs to be replaced with the corresponding connection device, which causes the test cost to increase along with the design cost. Therefore, the existing device is not convenient. Summary of the invention

[0003] In order to overcome the shortcomings of the existing device being complicated and not cheap when connected to the ground door bridge assembly, the present invention proposes a low door bridge assembly NVH testing machine.

[0004] The technical solution of the present invention is: a low gate bridge assembly NVH test machine, including a T-shaped bottom plate, an input shaft frame and a symmetrically distributed output shaft frame are installed on the T-shaped bottom plate, the output shaft frame is provided with an output connecting shaft, a fixed ring is fixedly connected to the side of the output connecting shaft close to the gate bridge assembly, and evenly distributed sliding blocks are arranged in the fixed ring, all of the sliding blocks are fitted with adjacent output connecting shafts, one of the sliding blocks on the same output connecting shaft is fixedly connected to the adjacent fixed ring, and the remaining sliding blocks are slidably connected to the adjacent fixed ring, the sliding block is rotatably connected to a connecting rod, the connecting rod is rotatably connected to a sliding rod, and the A spring telescopic rod is slidably connected to the side of the output connecting shaft close to the gate bridge assembly, the sliding rod is located between the fixed part and the telescopic end of the adjacent spring telescopic rod, a first elastic member is installed between the sliding rod and the adjacent spring telescopic rod, a plurality of sensors for collecting noise and vibration are arranged on the T-shaped bottom plate, a clamping mechanism for clamping the adjacent output shaft of the gate bridge assembly is arranged on the side of the sliding rod away from the adjacent spring telescopic rod, a disassembly mechanism for facilitating the disassembly of the sliding block is arranged on the side of the output connecting shaft close to the gate bridge assembly, and a connecting mechanism for connecting to the input shaft of the gate bridge assembly is arranged on the input shaft frame.

[0005] Furthermore, the clamping mechanism includes a fixed clamping block, which is fixed to a side of the adjacent sliding rod away from the spring telescopic rod. The fixed clamping block is rotatably connected to a rotating clamping block, a torsion spring is installed at the rotating connection between the two, and a first elastic plate is fixed between the fixed clamping block and the adjacent rotating clamping block.

[0006] Furthermore, a second elastic plate is fixedly connected inside the rotating clamp block, the elastic force of the second elastic plate is smaller than the elastic force of the first elastic plate, and the elastic force of the second elastic plate is larger than the elastic force of the torsion spring between the fixed clamp block and the adjacent rotating clamp block.

[0007] Further, the disassembly mechanism includes a sliding ring, which is slidably connected to the side of the adjacent output connecting shaft close to the adjacent fixed ring, the sliding block is extruded and fitted with the adjacent sliding ring, the side of the output connecting shaft close to the adjacent sliding ring is threadedly connected with a circumferentially evenly distributed limiting bolt, the limiting bolt is limitedly fitted with the adjacent sliding ring, and the side of the output connecting shaft close to the gate bridge assembly is provided with an extrusion component for controlling the mutual extrusion between the adjacent and evenly distributed sliding blocks.

[0008] Furthermore, the extrusion component includes a fixed plate evenly distributed in the circumferential direction, the fixed plate is fixedly connected to the adjacent sliding blocks, and there is only one fixed plate between the two adjacent sliding blocks, the fixed plate is slidably connected to a limiting plate, the limiting plate is extruded and matched with the adjacent sliding blocks, a side of the sliding block away from the adjacent fixed ring is fixedly connected to a first pneumatic telescopic rod, a side of the sliding block close to the fixed plate thereon is fixedly connected to a second pneumatic telescopic rod connected to the adjacent first pneumatic telescopic rod, the telescopic end of the second pneumatic telescopic rod is fixedly connected to an extrusion plate, and the extrusion plate is extruded and matched with the adjacent limiting plate.

[0009] Furthermore, the output connecting shaft is threadedly connected with an extrusion ring, the telescopic end of the first pneumatic telescopic rod is extruded and matched with the adjacent extrusion ring, and the output connecting shaft is threadedly connected with a limit ring, and the limit ring is extruded and matched with the extrusion ring.

[0010] Furthermore, the input shaft frame is fixedly connected to a fixing column, the output shaft frame and the fixing column are both fixedly connected to a first electric push rod, the telescopic end of the first electric push rod is fixedly connected to an isolation cover, and the output shaft and input shaft on the gate bridge assembly are respectively located in adjacent isolation covers.

[0011] Further, the connecting mechanism includes a second electric push rod, which is fixedly connected to a side of the fixed column close to the gate bridge assembly, the input shaft frame is provided with an input connecting shaft, the input connecting shaft is located in the fixed column, the telescopic end of the second electric push rod is fixedly connected to a connecting ring, the connecting ring is rotatably connected to a rotating ring, the rotating ring is fixedly connected to a circumferentially evenly distributed limiting piece, the input connecting shaft is slidably connected to a circumferentially evenly distributed sliding block on a side close to the gate bridge assembly, and the limiting piece is slidably connected to an adjacent sliding block.

[0012] Furthermore, the T-shaped bottom plate is fixedly connected with symmetrically distributed electric slide rails, the electric slide rails are slidably connected with symmetrically distributed electric sliders, the electric sliders are fixedly connected with a third electric push rod, and the telescopic end of the third electric push rod is fixedly connected with a threaded column.

[0013] Furthermore, it also includes a reinforcement component for fastening the connection between the input connecting shaft and the input shaft of the gate bridge assembly, the reinforcement component is arranged on the side of the input connecting shaft close to the gate bridge assembly, the reinforcement component includes a sliding plate evenly distributed in the circumferential direction, the sliding plate is slidably connected to the side of the input connecting shaft close to the gate bridge assembly, a second elastic member is installed between the sliding plate and the input connecting shaft, and the sliding plate is fixed with symmetrically distributed weight blocks.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention drives adjacent components to move by means of a spring telescopic rod, and adjusts the distance that the sliding rod extends beyond the adjacent output connecting shaft, so that the device can automatically adapt to the output shafts of various gate bridge assemblies with different diameters, thereby increasing the convenience of the device.

[0015] The present invention designs the sliding block to be detachably connected, so that bolts in various positions can be clamped, and the installed sliding blocks are automatically squeezed to equidistantly distributed positions through the linkage of the first pneumatic telescopic rod and the adjacent second pneumatic telescopic rod, thereby reducing the debugging time of the device and increasing the application scope of the device.

[0016] The present invention increases the connection strength between the input connecting shaft and the input shaft of the portal bridge assembly during high-speed rotation by cooperating with the sliding plate and the adjacent weight blocks, so as to reduce the noise generated by the input shaft of the portal bridge assembly, and the degree of increase in the connection strength is proportional to the rotation speed of the input connecting shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the output shaft frame, the input shaft frame and the output connecting shaft of the present invention;

[0019] Figure 3 For the present invention Figure 2 The enlarged view of point A in the middle;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the connecting rod, the sliding rod and the spring telescopic rod of the present invention;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the sliding block, the connecting rod and the sliding rod of the present invention;

[0022] Figure 6 It is a cross-sectional view of the spring telescopic rod, the extrusion ring and the limiting ring of the present invention;

[0023] Figure 7 An exploded view of the sliding block, the connecting rod and the sliding rod of the present invention;

[0024] Figure 8 It is a schematic diagram of the fixed clamping block, the rotating clamping block and the first elastic plate of the present invention;

[0025] Fig. 9 It is a schematic diagram of the three-dimensional structure of the limit plate, the second pneumatic telescopic rod and the extrusion plate of the present invention;

[0026] Fig.10 It is a schematic diagram of the three-dimensional structure of the fixed column, the second electric push rod and the input connecting shaft of the present invention;

[0027] Fig.11 It is a schematic diagram of the three-dimensional structure of the input connecting shaft, the connecting ring and the rotating ring of the present invention;

[0028] Fig.12 The sectional view of the input connecting shaft, the sliding block and the sliding plate of the present invention.

[0029] In the accompanying drawings: 1-T-type base plate, 101-gate bridge assembly, 2-output shaft frame, 3-input shaft frame, 4-output connecting shaft, 5-fixed ring, 6-sliding block, 7-connecting rod, 8-sliding rod, 9-spring telescopic rod, 91-first elastic member, 10-fixed card block, 11-rotating card block, 12-first elastic plate, 13-second elastic plate, 15-sliding ring, 16-limiting bolt, 17-fixed plate, 18-limiting plate, 19-first pneumatic Telescopic rod, 20-second pneumatic telescopic rod, 21-extrusion plate, 22-extrusion ring, 23-limiting ring, 24-fixing column, 25-first electric push rod, 26-isolation cover, 27-second electric push rod, 28-input connecting shaft, 29-connecting ring, 30-rotating ring, 31-limiting piece, 32-sliding block, 33-electric slide rail, 34-third electric push rod, 35-threaded column, 36-sliding plate, 361-second elastic piece, 37-weight block. DETAILED DESCRIPTION

[0030] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0031] Embodiment 1: Because when the existing NVH testing machine is connected to the load, the load shaft of the existing device is usually directly connected to the output shaft adjacent to the low-gate bridge assembly through bolts and nuts. The connection process is cumbersome and time-consuming, resulting in a waste of time. If the position of the bolts on the designed low-gate bridge assembly is different, it is necessary to replace an additional connecting device, resulting in a low cost of the existing device.

[0032] A low door bridge assembly NVH test machine, refer to Figure 1-Figure 6, including a T-type bottom plate 1 and a corresponding control terminal, wherein the tested part is a gate bridge assembly 101, which is an existing device, and is provided with an input shaft, two output shafts and four connecting beams for connecting with the chassis of the automobile (all existing structures), an input shaft rack 3 and two output shaft racks 2 symmetrically distributed on the left and right are installed on the T-type bottom plate 1, the output shaft rack 2 and the input shaft rack 3 are both electrically connected to the control terminal, and the lower side of the output shaft rack 2 and the lower side of the input shaft rack 3 are both provided with a transmission device (the transmission device is an existing The input shaft frame 3 is provided with a motor for providing power to the input shaft of the gate bridge assembly 101. The output shaft frame 2 is provided with an output connecting shaft 4, and the output connecting shaft 4 is used to provide a load to the output shaft of the gate bridge assembly 101. The output connecting shaft 4 is fixedly connected with a fixing ring 5, and the fixing ring 5 is provided with evenly distributed sliding blocks 6. All sliding blocks 6 are fitted with adjacent output connecting shafts 4. One of the sliding blocks 6 on the same output connecting shaft 4 is fixedly connected with the adjacent fixing ring 5, and the remaining sliding blocks 6 is slidably connected to the adjacent fixed ring 5, the sliding block 6 is rotatably connected to the connecting rod 7, the connecting rod 7 is rotatably connected to the sliding rod 8, the opposite sides of the two output connecting shafts 4 are slidably connected to the spring telescopic rod 9, the sliding rod 8 is located between the fixed part and the telescopic end of the adjacent spring telescopic rod 9, a first elastic member 91 is installed between the sliding rod 8 and the adjacent spring telescopic rod 9, the first elastic member 91 is a spring, and the elastic force of the first elastic member 91 is less than the elastic force of the spring telescopic rod 9, and a plurality of sensors electrically connected to the control terminal are arranged on the T-shaped bottom plate 1. The sensor is used to collect the noise and vibration generated by the gate bridge assembly 101 during the test. The side of the sliding rod 8 away from the adjacent spring telescopic rod 9 is provided with a clamping mechanism for clamping the adjacent output shaft of the gate bridge assembly 101, thereby connecting the output connecting shaft 4 to the adjacent output shaft of the gate bridge assembly 101. The side of the output connecting shaft 4 close to the gate bridge assembly 101 is provided with a disassembly mechanism for facilitating the disassembly of the sliding block 6. The input shaft frame 3 is provided with a connecting mechanism for connecting to the input shaft of the gate bridge assembly 101, and the connecting mechanism is electrically connected to the control terminal.

[0033] Reference Figure 6-Figure 8The clamping mechanism includes a fixed block 10 fixed to the outside of the adjacent sliding rod 8, and the outside of the fixed block 10 is rotatably connected to a rotating block 11. A torsion spring is installed at the rotation connection between the two. The fixed block 10 and the rotating block 11 form a structure similar to a claw. When the claws formed by the two are closed, the adjacent bolts on the input shaft of the gate bridge assembly 101 are clamped. A first elastic plate 12 is fixed between the fixed block 10 and the adjacent rotating block 11. When the bolt squeezes the first elastic plate 12, the first elastic plate The extrusion deformation of 12 drives the adjacent rotating block 11 to rotate and close. A second elastic plate 13 is fixedly connected to the rotating block 11. The second elastic plate 13 is deformed when squeezed by the adjacent bolts to fill the gap between the rotating block 11 and the bolts. The elastic force of the second elastic plate 13 is less than the elastic force of the first elastic plate 12, so that when the first elastic plate 12 is deformed, it drives the second elastic plate 13 to deform through its own elastic force. The elastic force of the second elastic plate 13 is greater than the elastic force of the torsion spring between the fixed block 10 and the adjacent rotating block 11.

[0034] Reference Figure 6 and Fig. 9 The disassembly mechanism includes a sliding ring 15 that is slidably connected to the adjacent output connecting shaft 4 near the adjacent fixing ring 5. The sliding ring 15 squeezes the adjacent sliding block 6 so that the adjacent sliding block 6 is always located in the adjacent fixing ring 5, thereby ensuring the stable connection of the sliding block 6. One side of the output connecting shaft 4 near the adjacent sliding ring 15 is threadedly connected with four circumferentially evenly distributed limiting bolts 16. The limiting bolts 16 limit the adjacent sliding ring 15 by protruding from the surface of the adjacent output connecting shaft 4. The side of the output connecting shaft 4 near the gate bridge assembly 101 is provided with an extrusion component for controlling the mutual extrusion between adjacent and evenly distributed sliding blocks 6.

[0035] Reference Figure 6 , Figure 7 and Fig. 9The extrusion component includes fixed plates 17 that are evenly distributed in the circumference and fixed to adjacent sliding blocks 6 respectively. The fixed plates 17 correspond to the sliding blocks 6 on the same output connecting shaft 4 one by one, and there is only one fixed plate 17 between two adjacent sliding blocks 6. The fixed plate 17 is slidably connected to a limit plate 18. The limit plate 18 on the same output connecting shaft 4 squeezes the adjacent sliding blocks 6 in sequence to ensure that the sliding blocks 6 on the same output connecting shaft 4 are equidistantly distributed. The side of the sliding block 6 away from the adjacent fixed ring 5 is fixed with a first pneumatic telescopic rod 19. A second pneumatic telescopic rod 20 connected to an adjacent first pneumatic telescopic rod 19 is fixedly connected to the sliding block 6 near the fixed plate 17 on it. The gas in the first pneumatic telescopic rod 19 and the second pneumatic telescopic rod 20 is initially in a compressed state. An extrusion plate 21 is fixedly connected to the telescopic end of the second pneumatic telescopic rod 20. In the initial state, the extrusion plate 21 squeezes the adjacent limit plate 18 under the action of the compressed gas in the adjacent first pneumatic telescopic rod 19, thereby driving the limit plate 18 to squeeze the sliding block 6 in contact with it, so that the distance between the two adjacent sliding blocks 6 is maintained at the maximum state.

[0036] Reference Figure 5 , Figure 6 and Fig. 9 The output connecting shaft 4 is threadedly connected with an extrusion ring 22, which increases the pressure of the gas in the first pneumatic telescopic rod 19 by squeezing the telescopic end of the adjacent first pneumatic telescopic rod 19. The output connecting shaft 4 is threadedly connected with a limit ring 23, which is squeezed and matched with the extrusion ring 22 to prevent the limit ring 23 from loosening under vibration. A fixing column 24 is fixedly connected to the front side of the input shaft frame 3. The output shaft frame 2 and the fixing column 24 are both fixedly connected with a first electric push rod 25 electrically connected to the control terminal. The telescopic end of the first electric push rod 25 is fixedly connected with an isolation cover 26. The isolation cover 26 is covered on the output shaft and the input shaft of the gate bridge assembly 101 to separate the noise generated at the above three places from the outside world, thereby stripping off the interference of small vibrations generated at the connection, thereby improving the accuracy of NVH testing of the overall structure of the gate bridge assembly 101.

[0037] Reference Figure 2 , Figure 10-12The connecting mechanism includes a second electric push rod 27 fixed to the front side of the fixed column 24, the second electric push rod 27 is electrically connected to the control terminal, the input shaft frame 3 is provided with an input connecting shaft 28, the input connecting shaft 28 penetrates the fixed column 24 and is fixed to the output shaft of the motor in the input shaft frame 3, the front side of the telescopic end of the second electric push rod 27 is fixed with a connecting ring 29, the front side of the connecting ring 29 is rotatably connected with a rotating ring 30, the front side of the rotating ring 30 is fixed with four circumferentially evenly distributed stoppers 31, the front side of the stopper 31 is provided with a groove, the front side of the input connecting shaft 28 is slidably connected with There are four sliding blocks 32 evenly distributed in the circumferential direction, and the sliding blocks 32 are slidably connected to the grooves of the adjacent limit members 31. The sliding blocks 32 are provided with through holes for facilitating the insertion of the input shaft of the gate bridge assembly 101. The T-shaped bottom plate 1 is fixedly connected with electric slide rails 33 which are symmetrically distributed and electrically connected to the control terminal. The electric slide rails 33 are slidably connected with two electric sliders which are symmetrically distributed front and back. The electric slider is fixedly connected with a third electric push rod 34 which is electrically connected to the control terminal. A threaded column 35 is fixedly connected to the upper side of the telescopic end of the third electric push rod 34, and the threaded column 35 is fixedly connected to the gate bridge assembly 101 by bolts.

[0038] When the staff conducts the NVH test on the designed portal bridge assembly 101, they first control the movement of the electric sliders on the two electric slide rails 33 through the control terminal, adjust the distance between the four third electric push rods 34, place the portal bridge assembly 101 on the four third electric push rods 34, and ensure that the four threaded columns 35 are inserted into the four connecting beams of the portal bridge assembly 101. Then, the staff fixes the portal bridge assembly 101 by installing nuts on the four threaded columns 35. After fixing the portal bridge assembly 101, the staff controls the control terminal The four third electric push rods 34 are controlled to extend and retract together to adjust the height of the gate bridge assembly 101. The electric sliders on the two electric slide rails 33 are controlled to move together through the control terminal to adjust the position of the gate bridge assembly 101, thereby ensuring that the output shaft of the gate bridge assembly 101 is aligned with the adjacent output connecting shaft 4, and the input shaft of the gate bridge assembly 101 is aligned with the input connecting shaft 28. Finally, the staff prepares to connect the output connecting shaft 4 with the output shaft of the gate bridge assembly 101, and connect the input connecting shaft 28 with the input shaft of the gate bridge assembly 101.

[0039] When the staff connects the output connecting shaft 4 with the output shaft of the gate bridge assembly 101, the staff first determines the number of bolts on the output shaft of the gate bridge assembly 101. When the number of bolts thereon is the same as the number of the sliding block 6 and adjacent parts and no corresponding adjustment is required, the staff manually rotates the output connecting shaft 4 to align all the fixed blocks 10 with the adjacent bolts on the gate bridge assembly 101 one by one. Then the staff starts the transmission device under the output shaft frame 2 and controls the output shaft frame 2 to drive the output connecting shaft 4 to move toward the gate bridge assembly 101. Take the left output connecting shaft 4 and adjacent parts as an example:

[0040] When the left output connecting shaft 4 is driven by the adjacent output shaft frame 2 to move to the right, the first elastic member 91 drives the spring telescopic rod 9 to move to the right together until the spring telescopic rod 9 contacts the gate bridge assembly 101, and then the spring telescopic rod 9 is squeezed to move inside the output connecting shaft 4, and the first elastic member 91 is compressed and stored. At this time, the spring telescopic rod 9 drives the sliding rod 8, the fixed block 10 and the rotating block 11 to move to the left relative to the output connecting shaft 4 through its telescopic end, and the sliding rod 8 squeezes the adjacent connecting rod 7 to rotate outward to open, and the sliding rod 8 moves synchronously to the outside of the spring telescopic rod 9. When the fixed block 10 drives the adjacent first During the movement of the elastic plate 12, when the first elastic plate 12 contacts the adjacent bolt, the first elastic plate 12 is squeezed and deformed by the adjacent bolt, and the first elastic plate 12 drives the adjacent rotating block 11 to rotate downward, and the rotating block 11 gradually closes with the adjacent fixed block 10. At this time, the second elastic plate 13 also contacts the adjacent bolt, and the second elastic plate 13 cooperates with the adjacent first elastic plate 12 to clamp the adjacent bolt. When the rotating block 11 rotates to align with the adjacent fixed block 10, the adjacent fixed block 10 can no longer move upward, and the adjacent connecting rod 7 can no longer rotate, and the spring telescopic rod 9 can no longer move toward the output connecting shaft 4.

[0041] When the spring telescopic rod 9 cannot move into the output connecting shaft 4, the output connecting shaft 4 squeezes the adjacent output shaft of the gate bridge assembly 101 through the spring telescopic rod 9. At this time, the telescopic end of the spring telescopic rod 9 is subjected to force to squeeze the adjacent sliding rod 8, and then the adjacent sliding rod 8 is clamped synchronously to prevent the sliding rod 8 and adjacent components from loosening relative to the spring telescopic rod 9 during rotation. When the telescopic end of the spring telescopic rod 9 is subjected to a certain squeezing force, the control terminal automatically controls the adjacent output shaft frame 2 to stop moving.

[0042] If the number of bolts on the gate bridge assembly 101 is different from the number of the sliding block 6 and adjacent components, when the sliding block 6 needs to be loaded and unloaded, taking the disassembly of a sliding block 6 on the left output connecting shaft 4 as an example, the staff first rotates the limit ring 23 to control the limit ring 23 to move to the right along the thread, and the limit ring 23 no longer squeezes the adjacent squeezing ring 22. Then the staff rotates the squeezing ring 22 to control the squeezing ring 22 to move to the right along the thread. At this time, the squeezing ring 22 no longer squeezes the adjacent first pneumatic telescopic rod 19. The telescopic end of the first pneumatic telescopic rod 19 extends to the right under the action of the internal gas pressure and is in a free moving state. At this time, the compressed gas in the telescopic end of the second pneumatic telescopic rod 20 flows into the first pneumatic telescopic rod 19, and the telescopic end of the second pneumatic telescopic rod 20 returns to a stress-free state, and no longer drives the adjacent squeezing plate 21 and the adjacent limit plate 18 to squeeze the adjacent sliding block 6, that is, there is no longer pressure between the limit plate 18 and the adjacent sliding block 6.

[0043] After the staff rotates the extrusion ring 22, they use a wrench to screw the four limit bolts 16 into the output connecting shaft 4 respectively. When the limit bolts 16 are screwed into the output connecting shaft 4, the limit bolts 16 no longer limit the sliding ring 15. The staff moves the sliding ring 15 to the right. At this time, the sliding block 6 is no longer limited and squeezed by the sliding ring 15. The staff removes any movable sliding block 6 and adjacent parts to ensure that the number of fixed card blocks 10 and adjacent parts corresponds to the number of bolts on the gate bridge assembly 101. When the fixed card blocks 10 and adjacent parts When the number is less than the number of bolts on the gate bridge assembly 101, the staff will insert a new sliding block 6 and the connected sliding rod 8 into the spring telescopic rod 9, and insert the sliding block 6 into the fixed ring 5. When the staff has completed the adjustment of the number of sliding blocks 6, the staff will move the sliding ring 15 to reset it, and then the staff will use a wrench to screw the four limit bolts 16 upward a certain distance to reset it, so that the four limit bolts 16 can resume the limit on the sliding ring 15. At this time, all sliding blocks 6 are limited by the sliding ring 15, and the sliding blocks 6 can no longer be pulled out of the fixed ring 5.

[0044] After the staff rotates and resets the four limit bolts 16, the staff rotates the extrusion ring 22 to move and reset, and the extrusion ring 22 moves to the left along the adjacent thread. When the extrusion ring 22 contacts the first pneumatic telescopic rod 19, the extrusion ring 22 re-extrudes the telescopic end of the first pneumatic telescopic rod 19 to move to the left, thereby squeezing the gas in the first pneumatic telescopic rod 19 to be compressed. The gas in the first pneumatic telescopic rod 19 is filled into the second pneumatic telescopic rod 20 during the compression process. The air pressure in the two is the same, and the telescopic end of the second pneumatic telescopic rod 20 is pushed to the right by the gas. The telescopic end of the second pneumatic telescopic rod 20 drives the adjacent extrusion plate 21 to move to the right together, and the extrusion plate 21 squeezes the adjacent limit plate 18 and moves along the adjacent fixed plate 17. At this time, the output connecting shaft 4 The limit plate 18 moves together, and the limit plate 18 squeezes the adjacent sliding blocks 6 in turn. Except for the fixed sliding blocks 6, the other sliding blocks 6 slide along the fixed ring 5 until all the sliding blocks 6 are squeezed to an equidistant distribution state, and then the extrusion ring 22 continues to move to the left, and gradually increases the pressure of the gas in the first pneumatic telescopic rod 19 and the second pneumatic telescopic rod 20 to increase the pressure between all the sliding blocks 6. When the extrusion ring 22 is reset to its original position, the staff rotates the limit ring 23 to reset to the left, so that the limit ring 23 squeezes the extrusion ring 22 to prevent the extrusion ring 22 from loosening during rotation. After the staff adjusts the number of sliding blocks 6, the sliding blocks 6 and adjacent components are controlled to be connected to the adjacent output shafts on the gate bridge assembly 101 according to the above principle.

[0045] After the staff connects the output connecting shaft 4 and its components with the adjacent output shaft on the gate bridge assembly 101, and prepares to connect the input connecting shaft 28 on the input shaft frame 3 with the input shaft of the gate bridge assembly 101, the staff first controls the telescopic end of the second electric push rod 27 to extend forward, and the telescopic end of the second electric push rod 27 drives the connecting ring 29 and the rotating ring 30 to move forward together, and the rotating ring 30 drives the adjacent limiting member 31 to move forward together, and the limiting member 31 drives the adjacent sliding block 32 to move to the side away from the input connecting shaft 28 during the movement, so as to change the position of the through holes on the four sliding blocks 32, so as to facilitate the operation of various The position of the bolts on the input shaft of the gate bridge assembly 101 corresponds to that of the bolts on the input shaft. After the adjustment is completed, the staff closes the second electric push rod 27 through the control terminal, and controls the transmission device on the lower side of the input shaft frame 3 to drive itself to move forward until the bolts on the input shaft of the gate bridge assembly 101 are inserted into the adjacent through holes. Then the control terminal controls the transmission device on the lower side of the input shaft frame 3 to drive the input shaft frame 3, that is, the adjacent parts, to move forward a certain distance to increase the pressure between the input connecting shaft 28 and the four sliding blocks 32 and the input shaft of the gate bridge assembly 101, and increase the connection strength between the input connecting shaft 28 and the input shaft of the gate bridge assembly 101 through friction.

[0046] When the staff has completed the connection, the telescopic ends of the three first electric push rods 25 are controlled to move through the control terminal. The telescopic ends of the first electric push rods 25 drive the adjacent isolation covers 26 to move, covering the input shaft and output shaft of the gate bridge assembly 101, so as to facilitate the separate measurement of the noise at the input shaft and the output shaft of the gate bridge assembly 101, thereby increasing the accuracy of the measurement data. When the staff starts to conduct NVH experiments on the gate bridge assembly 101, the staff first starts the motor in the input shaft frame 3, drives the input shaft of the gate bridge assembly 101 to rotate through the input connecting shaft 28, and adjusts the load in the output shaft frame 2, thereby adjusting the resistance encountered by the output shaft of the gate bridge assembly 101 when rotating, so as to simulate various road conditions that may be encountered during the driving process of various vehicles. In this process, the control terminal collects the noise, vibration amplitude and vibration frequency emitted by the gate bridge assembly 101 through sensors arranged at various locations on the T-shaped bottom plate 1, and records the data for analysis by the staff.

[0047] When the test is completed, the staff closes the input shaft frame 3 and other components through the control terminal, and reverses the operation according to the above principle to remove the portal bridge assembly 101. The staff then prepares to test the next portal bridge assembly 101. When all portal bridge assemblies 101 are tested, the staff closes the device and leaves the operating workshop.

[0048] Example 2: Based on Example 1, Fig.12, also includes a reinforcement component arranged on the front side of the input connecting shaft 28, the reinforcement component is used to fasten the input connecting shaft 28 to the input shaft of the gate bridge assembly 101, the reinforcement component includes four sliding plates 36 evenly distributed in the circumferential direction, the sliding plate 36 is made of elastic material, the sliding plate 36 is located at the adjacent sliding block 32, the sliding plate 36 is slidably connected to the front side of the input connecting shaft 28, a second elastic member 361 is installed between the sliding plate 36 and the input connecting shaft 28, the second elastic member 361 is a tension spring, the sliding plate 36 is fixed with two symmetrically distributed weight blocks 37, the weight blocks 37 drive the adjacent sliding plates 36 to move through centrifugal force, thereby improving the fixing force on the bolts of the adjacent gate bridge assembly 101 input shafts and reducing the slight vibration generated at the connection.

[0049] When the output connecting shaft 4 starts to drive the input shaft of the gate bridge assembly 101 to rotate, the output connecting shaft 4 drives the sliding plate 36 and the weight block 37 to rotate together. The weight block 37 is driven by the centrifugal force to drive the adjacent sliding plate 36 to move to the side away from the input connecting shaft 28. The second elastic member 361 stretches and stores force. When the sliding plate 36 contacts the bolt of the input shaft of the gate bridge assembly 101, the sliding plate 36 cannot continue to move. At this time, the weight block 37 drives the adjacent sliding plate 36 to bend and deform during the continued movement, so that the sliding plate 36 is wrapped around the bolt of the input shaft of the gate bridge assembly 101, providing further fixation for the bolt. The faster the rotation speed, the greater the fixing force, further reducing the noise generated between the input shaft of the gate bridge assembly 101 and the input connecting shaft 28, thereby avoiding affecting the NVH test of the gate bridge assembly 101. When the input connecting shaft 28 stops rotating, the sliding plate 36 and adjacent components are automatically reset under the drive of the second elastic member 361.

[0050] The above description is only an example of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention should be included in the protection scope of the present invention. The contents not elaborated in detail in the present invention belong to the existing technologies known to those skilled in the art.

Claims

1. A low-gate bridge assembly NVH testing machine, comprising a T-shaped base plate (1), on which an input shaft frame (3) and symmetrically distributed output shaft frames (2) are mounted, and the output shaft frame (2) is provided with an output connecting shaft (4), characterized in that: The invention also comprises a fixing ring (5), wherein the fixing ring (5) is fixedly connected to a side of the output connecting shaft (4) close to the gate bridge assembly (101), and evenly distributed sliding blocks (6) are arranged inside the fixing ring (5), and all the sliding blocks (6) are in contact with adjacent output connecting shafts (4), and one of the sliding blocks (6) on the same output connecting shaft (4) is fixedly connected to an adjacent fixing ring (5), and the remaining sliding blocks (6) are slidably connected to adjacent fixing rings (5), and the sliding blocks (6) are rotatably connected to a connecting rod (7), and the connecting rod (7) is rotatably connected to a sliding rod (8), and the side of the output connecting shaft (4) close to the gate bridge assembly (101) is slidably connected to a spring telescopic rod (9 ), the sliding rod (8) is located between the fixed portion and the telescopic end of the adjacent spring telescopic rod (9), a first elastic member (91) is installed between the sliding rod (8) and the adjacent spring telescopic rod (9), a plurality of sensors for collecting noise and vibration are arranged on the T-shaped bottom plate (1), a clamping mechanism for clamping the adjacent output shaft of the gate bridge assembly (101) is arranged on the side of the sliding rod (8) away from the adjacent spring telescopic rod (9), a disassembly mechanism for facilitating the disassembly of the sliding block (6) is arranged on the side of the output connecting shaft (4) close to the gate bridge assembly (101), and a connecting mechanism for connecting with the input shaft of the gate bridge assembly (101) is arranged on the input shaft frame (3).

2. The low door bridge assembly NVH testing machine according to claim 1, characterized in that: The clamping mechanism comprises a fixed clamping block (10), the fixed clamping block (10) being fixedly connected to a side of the adjacent sliding rod (8) away from the spring telescopic rod (9), the fixed clamping block (10) being rotatably connected to a rotating clamping block (11), a torsion spring being installed at the rotational connection between the two, and a first elastic plate (12) being fixedly connected between the fixed clamping block (10) and the adjacent rotating clamping block (11).

3. A low door bridge assembly NVH testing machine according to claim 2, characterized in that: A second elastic plate (13) is fixedly connected inside the rotating clamping block (11), the elastic force of the second elastic plate (13) is smaller than the elastic force of the first elastic plate (12), and the elastic force of the second elastic plate (13) is larger than the elastic force of the torsion spring between the fixed clamping block (10) and the adjacent rotating clamping block (11).

4. The low door bridge assembly NVH testing machine according to claim 1, characterized in that: The disassembly mechanism comprises a sliding ring (15), wherein the sliding ring (15) is slidably connected to a side of an adjacent output connecting shaft (4) close to an adjacent fixing ring (5), the sliding block (6) is extruded and matched with the adjacent sliding ring (15), a side of the output connecting shaft (4) close to the adjacent sliding ring (15) is threadedly connected with a circumferentially uniformly distributed limiting bolt (16), the limiting bolt (16) is limitedly matched with the adjacent sliding ring (15), and a pressing component for controlling the mutual extrusion between the adjacent and uniformly distributed sliding blocks (6) is provided on a side of the output connecting shaft (4) close to the gate bridge assembly (101).

5. The low door bridge assembly NVH testing machine according to claim 4, characterized in that: The extrusion component comprises a fixing plate (17) uniformly distributed in the circumferential direction, the fixing plate (17) being fixedly connected to the adjacent sliding blocks (6), and there being only one fixing plate (17) between two adjacent sliding blocks (6), the fixing plate (17) being slidably connected to a limiting plate (18), the limiting plate (18) being extrusion-fitted with the adjacent sliding blocks (6), a first pneumatic telescopic rod (19) being fixedly connected to the side of the sliding block (6) away from the adjacent fixing ring (5), a second pneumatic telescopic rod (20) being connected to the adjacent first pneumatic telescopic rod (19) being fixedly connected to the side of the sliding block (6) close to the fixing plate (17) thereon, the telescopic end of the second pneumatic telescopic rod (20) being fixedly connected to a squeezing plate (21), the squeezing plate (21) being extrusion-fitted with the adjacent limiting plate (18).

6. The low door bridge assembly NVH testing machine according to claim 5, characterized in that: The output connecting shaft (4) is threadedly connected to an extrusion ring (22), the telescopic end of the first pneumatic telescopic rod (19) is extruded and matched with the adjacent extrusion ring (22), and the output connecting shaft (4) is threadedly connected to a limit ring (23), and the limit ring (23) is extruded and matched with the extrusion ring (22).

7. The low door bridge assembly NVH testing machine according to claim 1, characterized in that: The input shaft frame (3) is fixedly connected to a fixing column (24), the output shaft frame (2) and the fixing column (24) are both fixedly connected to a first electric push rod (25), the telescopic end of the first electric push rod (25) is fixedly connected to an isolation cover (26), and the output shaft and the input shaft on the gate bridge assembly (101) are respectively located in adjacent isolation covers (26).

8. The low door bridge assembly NVH testing machine according to claim 7, characterized in that: The connecting mechanism comprises a second electric push rod (27), the second electric push rod (27) being fixedly connected to a side of the fixed column (24) close to the gate bridge assembly (101), the input shaft frame (3) being provided with an input connecting shaft (28), the input connecting shaft (28) being located in the fixed column (24), a connecting ring (29) being fixedly connected to a connecting ring (30) at a telescopic end of the second electric push rod (27), the connecting ring (29) being rotatably connected to a rotating ring (30), the rotating ring (30) being fixedly connected to circumferentially uniformly distributed limiting members (31), a side of the input connecting shaft (28) close to the gate bridge assembly (101) being slidably connected to circumferentially uniformly distributed sliding blocks (32), the limiting members (31) being slidably connected to adjacent sliding blocks (32).

9. The low door bridge assembly NVH testing machine according to claim 1, characterized in that: The T-shaped bottom plate (1) is fixedly connected to symmetrically distributed electric slide rails (33), the electric slide rails (33) are slidably connected to symmetrically distributed electric sliders, the electric sliders are fixedly connected to third electric push rods (34), and the telescopic ends of the third electric push rods (34) are fixedly connected to threaded columns (35).

10. The low door bridge assembly NVH testing machine according to claim 8, characterized in that: It also includes a reinforcement component for fastening the input connecting shaft (28) to the input shaft of the gate bridge assembly (101), the reinforcement component is arranged on a side of the input connecting shaft (28) close to the gate bridge assembly (101), the reinforcement component includes a sliding plate (36) evenly distributed in the circumferential direction, the sliding plate (36) is slidably connected to a side of the input connecting shaft (28) close to the gate bridge assembly (101), a second elastic member (361) is installed between the sliding plate (36) and the input connecting shaft (28), and the sliding plate (36) is fixedly connected to symmetrically distributed weight blocks (37).

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